Orion IN676 Operating instructions

Hello! I have reviewed the provided instructions for the Orion SkyQuest XT Classic Dobsonians telescope. This document details the installation of several small but important components. I understand how to install the T-Nut, the plastic bushing and the rubber bumper that help in assembly and protecting mirror cell. I am ready to answer any questions you may have about the telescope or these specific instructions.
What is the purpose of the T-Nut?

Where should the plastic bushing be installed?

What is the function of the rubber bumper?

Where should the rubber bumper be placed?

ADDENDUM TO IN676 SKYQUEST XT CLASSIC DOBSONIANS

IN 676 Addendum 09/22

Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA

Toll Free USA & Canada: (800) 447-1001

International: +1(831) 763-7000

may be reproduced, copied, modied or adapted, without the prior written consent of Orion Telescopes & Binoculars.

AN EMPLOYEE-OWNED COMPANY

There are three small parts included with the Classic Dobsonians that are not mentioned in the manual. There is a small T-Nut that

is threaded onto the included center bolt for assembling the ground plate assembly (Figure 1). Unthread the T-Nut from this bolt

(Figure 2) and place into the center hole from the top side of the triangular plate (opposite the pre-installed feet). The center bolt will

thread up from the bottom to secure this in place.

The next part is a short black plastic bushing (Figure 3). This inserts into the center bore of the circular (top) baseplate. It will simply

slide in and be held in place as a friction t. This is designed to add stability to the center bolt. The diagram in Figure 4 illustrates

where the pieces should be installed.

The last part is an adhesive rubber bumper that is applied to the inside of the front base. The purpose of this is to cushion the mirror

cell so it does not hit against the base plate when pointing the scope vertical.

The rubber bumper provides a convenient “stop” for the telescope’s altitude motion. This prevents the telescope mirror cell from

being knocked against the hard surface of the base’s front brace. Remove the backing from the rubber bumper and position the

bumper so it is positioned in the spot where the optical tube (mirror cell) contacts the front base as shown in Figure 5a and 5b.

Press rmly so the adhesive holds the bumper securely in place

Figure 5. Position the tube on the mount pointed vertical. Place

the rubber bumper “stop” where the mirror cell contacts the front

base to cushion the impact.

Figure 1. T-Nut tthreaded onto the

included center bolt

Figure 2. T-Nut unthreaded Figure 3. Plastic bushing

Figure 4. Diagram

a. b.